AL1751 Service Guide
Page 6
...tub, swimming pool or in a bookcase or cabinet unless proper ventilation is equipped with a three-pronged grounded plug, a plug with the attached power adapter (output 12V DC) which have an electrician install the correct outlet, or use the monitor only with the monitor. If you are provided for... expose you mount the monitor on the label. Please refer all servicing to qualified service personnel To ensure satisfactory operation, use an adapter to power surges. If the monitor falls, it from overheating, be operated only from damage due to ground the appliance safely. To ensure ...
...tub, swimming pool or in a bookcase or cabinet unless proper ventilation is equipped with a three-pronged grounded plug, a plug with the attached power adapter (output 12V DC) which have an electrician install the correct outlet, or use the monitor only with the monitor. If you are provided for... expose you mount the monitor on the label. Please refer all servicing to qualified service personnel To ensure satisfactory operation, use an adapter to power surges. If the monitor falls, it from overheating, be operated only from damage due to ground the appliance safely. To ensure ...
AL1751 Service Guide
Page 8
... picture LOGO Chapter 2 Machine Disassembly Chapter 3 Troubleshooting Chapter 4 Connector Information Chapter 5 FRU (Field Replacement Unit) List Exploded Diagram Chapter 6 Schematic Diagram Top Power Input Scaler Panel interface Mpu Adapter Board Inverter Board 9 10 12 11 12 14 15 16 17 19 21 22 26 27 32 38 39 40 44 44 45...
... picture LOGO Chapter 2 Machine Disassembly Chapter 3 Troubleshooting Chapter 4 Connector Information Chapter 5 FRU (Field Replacement Unit) List Exploded Diagram Chapter 6 Schematic Diagram Top Power Input Scaler Panel interface Mpu Adapter Board Inverter Board 9 10 12 11 12 14 15 16 17 19 21 22 26 27 32 38 39 40 44 44 45...
AL1751 Service Guide
Page 14
The adapter will contain a main board (include: keypad board and audio board), an inverter board, adapter which house the flat panel control logic, brightness control logic and DDC. CCFL Drive. Monitor Block Diagram The LCD MONITOR will provide the 12V DC-power to inverter/power board and main board. The Inverter board will drive the backlight of panel. Flat Panel and CCFL backlight Inverter board Adapter AC-IN 100V-240V Main Board (Include: Audio board, keyboard) RS232 Connector For white balance adjustment in factory mode HOST Computer Video signal, DDC 14
The adapter will contain a main board (include: keypad board and audio board), an inverter board, adapter which house the flat panel control logic, brightness control logic and DDC. CCFL Drive. Monitor Block Diagram The LCD MONITOR will provide the 12V DC-power to inverter/power board and main board. The Inverter board will drive the backlight of panel. Flat Panel and CCFL backlight Inverter board Adapter AC-IN 100V-240V Main Board (Include: Audio board, keyboard) RS232 Connector For white balance adjustment in factory mode HOST Computer Video signal, DDC 14
AL1751 Service Guide
Page 32
No power No power Press power key and look if the picture is normal NG Replace X402 OK Replace U402 NG Replace U401 32 NG OK Replace U702 NG X402 oscillate waveform is normal NG Measure 12V input voltage OK NG Check the adapter section Measure U702 PIN2=5V? Chapter 3 Troubleshooting This chapter provides troubleshooting information for the AL1751: 1.
No power No power Press power key and look if the picture is normal NG Replace X402 OK Replace U402 NG Replace U401 32 NG OK Replace U702 NG X402 oscillate waveform is normal NG Measure 12V input voltage OK NG Check the adapter section Measure U702 PIN2=5V? Chapter 3 Troubleshooting This chapter provides troubleshooting information for the AL1751: 1.